makefs alignment issue

Stan Hoeppner
2014-10-24T20:11:28Z

Just remade a couple of filesystems and received an alignment msg I
don't recall receiving previously:

# mkfs.xfs -f -d su=64k,sw=12 /dev/s2d_a1l003
mkfs.xfs: Specified data stripe width 1536 is not the same as the volume
stripe width 2048
meta-data=/dev/s2d_a1l003 isize=256 agcount=44,
agsize=268435440 blks
= sectsz=512 attr=2, projid32bit=0
data = bsize=4096 blocks=11709285376, imaxpct=5
= sunit=16 swidth=192 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=16 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0

/dev/s2d_a1l003 is an alias to dm-0 which is a dm-multipath device to a
LUN on hardware RAID. The hardware geometry is 64kx 12, 768k. AFAIK no
geometry information has been specified for these device mapper devices
(someone else's responsibility). Though I assume dm geometry data is
the reason for mkfs.xfs throwing this alert. I don't find anything in
/sys/devices/virtual/block/dm-0/ indicating geometry.

Any ideas how to verify what's going on here and fix it?

Thanks,